As noted in the rc1 post, Rails 4.2 is no longer supported except for severe security patches, but the last release introduced a couple regressions that warranted a release. Unless more regressions are found this will likely be the last bug fix release for Rails 4.2.

CHANGES since 4.2.9

The following gems had changes since 4.2.9. Changes are listed below, or you can read the CHANGELOG’s on GitHub: